摘要 |
The aim of invention is to enable the amplitudes of selected spectral lines in the output signal from a ring interferometer to be determined simply and with the greatest possible accuracy. This is done as follows. A dividing network (FW) splits the digitized output signal from the ring interferometer into a first part-signal (s1), which contains the spectral lines with the odd multiples of the phase-modulation frequency, and a second part-signal (s2), which contains the spectral lines with the even multiples of the phase-modulation frequency. For each of these part-signals (s1, s2), there is at least one digital filter (F1, F2) which filters the spectral lines out of the corresponding part-signals (s1, s2) in order to determine their amplitude (A1, A2, A3, A4).
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申请人 |
ANT NACHRICHTENTECHNIK GMBH, 7150 BACKNANG, DE |
发明人 |
GOECKLER, HEINZ, DR.-ING., 7150 BACKNANG, DE |